luasocket/src/mbox.lua

93 lines
2.6 KiB
Lua

local _M = {}
if module then
mbox = _M
end
function _M.split_message(message_s)
local message = {}
message_s = string.gsub(message_s, "\r\n", "\n")
string.gsub(message_s, "^(.-\n)\n", function (h) message.headers = h end)
string.gsub(message_s, "^.-\n\n(.*)", function (b) message.body = b end)
if not message.body then
string.gsub(message_s, "^\n(.*)", function (b) message.body = b end)
end
if not message.headers and not message.body then
message.headers = message_s
end
return message.headers or "", message.body or ""
end
function _M.split_headers(headers_s)
local headers = {}
headers_s = string.gsub(headers_s, "\r\n", "\n")
headers_s = string.gsub(headers_s, "\n[ ]+", " ")
string.gsub("\n" .. headers_s, "\n([^\n]+)", function (h) table.insert(headers, h) end)
return headers
end
function _M.parse_header(header_s)
header_s = string.gsub(header_s, "\n[ ]+", " ")
header_s = string.gsub(header_s, "\n+", "")
local _, __, name, value = string.find(header_s, "([^%s:]-):%s*(.*)")
return name, value
end
function _M.parse_headers(headers_s)
local headers_t = _M.split_headers(headers_s)
local headers = {}
for i = 1, #headers_t do
local name, value = _M.parse_header(headers_t[i])
if name then
name = string.lower(name)
if headers[name] then
headers[name] = headers[name] .. ", " .. value
else headers[name] = value end
end
end
return headers
end
function _M.parse_from(from)
local _, __, name, address = string.find(from, "^%s*(.-)%s*%<(.-)%>")
if not address then
_, __, address = string.find(from, "%s*(.+)%s*")
end
name = name or ""
address = address or ""
if name == "" then name = address end
name = string.gsub(name, '"', "")
return name, address
end
function _M.split_mbox(mbox_s)
local mbox = {}
mbox_s = string.gsub(mbox_s, "\r\n", "\n") .."\n\nFrom \n"
local nj, i, j = 1, 1, 1
while 1 do
i, nj = string.find(mbox_s, "\n\nFrom .-\n", j)
if not i then break end
local message = string.sub(mbox_s, j, i-1)
table.insert(mbox, message)
j = nj+1
end
return mbox
end
function _M.parse(mbox_s)
local mbox = _M.split_mbox(mbox_s)
for i = 1, #mbox do
mbox[i] = _M.parse_message(mbox[i])
end
return mbox
end
function _M.parse_message(message_s)
local message = {}
message.headers, message.body = _M.split_message(message_s)
message.headers = _M.parse_headers(message.headers)
return message
end
return _M